In the European Union 14 weeks of paid leave are the legal minimum.
In Germany that means 6 weeks of paid leave before birth and 8 weeks of paid leave afterwards. There is an option of up to 14 months of additional wellfare for parents of either gender who decide to stay at home. Your workplace is protected in the meantime.
In Belgium it's 15 weeks paid leave and in France 16 (unless you have several children, then it's noticeably more).
In Denmark it's 18 weeks paid leave for the mother plus another 32 to be divided between both parents.
In Italy it's 5 months paid leave.
In Spain it's 26 weeks paid leave.
In Sweden it's 50 days paid leave before birth and 450 days after birth to be shared between both parents.
In Great Britain it's 24 weeks, the first 6 of them almost fully paid, the father can also take half a year off if the mother is working.
In the Netherlands it's 16 weeks of paid leave.
Austria has 16 weeks at 100% salary.
In Norway it's 10.5 months paid leave for the mother plus 10 weeks for the father.
Bulgaria has a year of paid leave.
Croatia has 26 week of paid leave ppaid for by public healthcare.
Iceland has 90 days paid leave plus another 90 days to be shared between both parents.
Lithuanians can chose between one year at full pay or two years at 52% pay.
Poland has 16-18 weeks paid leave.
Slovenian mothers have a whole year at 100% pay.
Brazilians have 120-180 days at full pay.
Canadians do in fact have a year at half pay.
Mexico has 12 weeks at 100% pay.
Panama has 14 weeks at full pay.
Actually, most Latin American countries have 12 weeks at full pay. In Venezuela it's 26 weeks at full pay.
Most African countries have 12 or 14 weeks at full or somewhat reduced leave.
Australia has 18 weeks at minimum wage.
Iran has half a year at full pay.
Korea has 90 days at 100%
Japan has 14 weeks at 60%.
New Zealand has 14 weeks at 100%
Vietnam has 4-6 months at 100%
I am skipping a lot of countries here, the actual list is longer: http://en.wikipedia.org/wiki/Parental_leave
Papua New Guinea is one of very few countries in the world with similar regulations to those of the USA: 12 weeks at 0%